Designing minimally segregating granular mixtures for gravity‐driven surface flows

In dense flowing bidisperse particle mixtures varying in size or density alone, smaller particles sink (percolation-driven) and lighter rise (buoyancy-driven). But when species differ from each other both density, percolation buoyancy can either enhance (large/light small/heavy) oppose (large/heavy small/light) other. the latter case, a local equilibrium exist which two mechanisms balance remain mixed: this allows design of minimally segregating by specifying ratio, mixture concentration. Using DEM simulations, we show that specified methodology relatively well-mixed heap tumbler flows. Furthermore, prepared fully segregated state mix over time eventually reach nearly uniform Tumbler experiments with large steel small glass validate simulations potential for designing mixtures.